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Freelance Java Backend Developer Jobs in Pennsylvania

CYNET SYSTEMS

Java Fullstack Developer

Pittsburgh, PA · On-site

$45 - $50/hr

We are looking for a skilled Java Backend Developer with exposure to AWS and emerging AI technologies to design, develop, and deploy scalable microservices and intelligent applications. Requirement ...

RELX

Java API Back End Developer

Harrisburg, PA · On-site

$78K - $131K/yr

Java API Back End Developer Are you a collaborative Java API Back End Developer looking to work for a mission driven global organization? About the role, we are looking for a Java API Back End ...

Elsevier

Java API Back End Developer

Harrisburg, PA · On-site

$78K - $131K/yr

Java API Back End Developer Are you a collaborative Java API Back End Developer looking to work for a mission driven global organization? About the role, we are looking for a Java API Back End ...

Apex Informatics

Java Fullstack Developer

Pittsburgh, PA · On-site

$51 - $65.75/hr

Fullstack Java Developer Location: Pittsburgh, PA Key Responsibilities ... Design and develop scalable backend services using Java and Spring Boot frameworks. * Implement and ...

Panna Knows LLC

Senior Java Backend Engineer

Philadelphia, PA · On-site

$121K - $157K/yr

What Our Client Needs A Senior Java Engineer to design, build, and scale cloud-native services that ... and DevOps teams to improve CI/CD and observability • Participate in code reviews, design ...

New

PKR

Senior Java Backend Engineer

Philadelphia, PA · Remote

$10 - $100/hr

What Our Client Needs A Senior Java Engineer to design, build, and scale cloud-native services that ... and DevOps teams to improve CI/CD and observability • Participate in code reviews, design ...

Diverse Lynx

Full Stack Java developer

Harrisburg, PA · On-site

$51.75 - $67/hr

Core Java & Backend Development. * 5+ years of hands on Java development experience. * Strong proficiency in Java (Java 8+) Solid understanding of: * Object Oriented Programming (OOP) * Design ...

New

Artech

Backend Java Developer

Pittsburgh, PA · On-site

$60/hr

Backend Java Developer Locations by preference: 1. Most preferred - Pittsburgh, PA, 15222 2. Second preferred - Cleveland, OH, 44136 / Dallas, TX, 75234 / Birmingham, AL, 35233 / Phoenix, AZ, 85016 ...

New

StackandCo

Senior Java/Microservices Developer

Cork, KY

$57.50 - $73.50/hr

... a modern Java backend stack. \n \n \n \n \n \n This is an exciting dev environment where you'll ... A passionate developer with an eagerness to work with the latest technologies \n \n \n \n \n \n

Artech

Full Stack Java Developer

Pittsburgh, PA · On-site

$49 - $63.25/hr

Full Stack Java Developer Position Location: Pittsburgh, PA, 15222 - 5 days a week onsite Length of ... backend for web-applications (Spring Boot, Spock, Groovy, Mockito, TestNG etc...), 6. Prior ...

New

Mirai, LLC

Full Stack Java Developer

Philadelphia, PA · On-site

$53 - $68.25/hr

The Developer will be part of a product team of designers and full-stack developers (Java back-end) developing a web and mobile application for use by the Front Line Associates & Managers in the ...

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Freelance Java Backend Developer information

What are the most commonly searched types of Java Backend Developer jobs in Pennsylvania? The most popular types of Java Backend Developer jobs in Pennsylvania are:
What cities in Pennsylvania are hiring for Freelance Java Backend Developer jobs? Cities in Pennsylvania with the most Freelance Java Backend Developer job openings:
Freelance Java Backend Developer jobs near you
Java Fullstack Developer

Java Fullstack Developer

CYNET SYSTEMS

Pittsburgh, PA • On-site

$45 - $50/hr

Contractor

Posted 23 days ago

Job description

Job Overview:

Pay Range: $45hr - $50hr

  • We are looking for a skilled Java Backend Developer with exposure to AWS and emerging AI technologies to design, develop, and deploy scalable microservices and intelligent applications.

Requirement/Must Have:

  • Strong experience in Core Java, Spring Boot, and REST APIs.
  • Knowledge of LLMs, AI agents, and Retrieval-Augmented Generation (RAG) frameworks.

Responsibilities:

  • Design, develop, and maintain scalable microservices using Core Java and Spring Boot.
  • Build and expose RESTful APIs ensuring high performance and security.
  • Deploy, monitor, and manage applications on AWS cloud services (EC2, S3, Lambda, RDS, API Gateway).
  • Implement and maintain CI/CD pipelines for automated deployments.
  • Integrate LLMs (Large Language Models) into backend services.
  • Develop AI agents using frameworks like AutoGen and implement RAG (Retrieval-Augmented Generation) solution.
  • Ensure code quality through best practices, code reviews, and testing.
  • Identify and resolve technical issues, bottlenecks, and performance problems.
  • Collaborate with cross-functional teams including frontend, DevOps, and product stakeholders.
  • Participate in Agile ceremonies such as sprint planning, stand-ups, and retrospectives.
  • Maintain proper documentation for APIs, system design, and workflows.
  • Monitor application performance and optimize for scalability and reliability.

Nice to Have:

  • Experience with emerging AI technologies.

Skills:

  • Core Java.
  • Spring Boot.
  • REST API.
  • Microservices.
  • AWS.
 

Founded in 2010 and headquartered in the Washington, DC metro area, Cynet Systems Inc. is a leading staffing and recruiting powerhouse. Proudly recognized as a nationally and locally certified diversity firm, Cynet delivers agile, scalable talent solutions across industries. With an active footprint in all 50 U.S. states and Canada, we support thousands of consultants through our expansive, high-performing recruitment engine operating across North America and Asia—ensuring speed, quality, and consistency in every hire.
Cynet Systems logo

About Cynet Systems

Sourced by ZipRecruiter

Cynet Systems Inc is a staffing and recruiting corporation nestled in Ashburn, VA, USA. Established in 2010, the company operates within the Information Technology and Services sector, specializing in providing effective workforce solutions to different business needs, including IT consulting, direct hire, and contract staffing services. Through the years, Cynet Systems has built an impressive portfolio, going beyond borders and expanding its operations internationally in Canada and India. Rooted in its core values of teamwork, leadership, and commitment, Cynet Systems helps businesses unlock their full potential by providing versatile and competent professionals that perfectly align with their needs. Fueled by their unwavering mission to deliver top-tier talent to businesses worldwide, Cynet Systems garnered various recognitions including SIA's fastest-growing staffing firms and Best Place to Work in Virginia for 2019.

Industry

It services

Company size

501 - 1,000 Employees

Headquarters location

Sterling, VA, US

Year founded

2010

Social media

Twitter

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